Michael cummlstgs



(No Model.)

M. GUMMINGS. MEANS POR SUPPORTING AND ADJUSTING KNITTING MACHINE BURRS, &c.

` 10.244,796. Patented July 26,1881.

Y VUNITED S13/xfreev PATENT @errent MICHAEL CU/MMINGS, OF COHOES, NEW YORK.

MEANS FOR SUPPORTING AND ADJUSTlNG KNITTING-MACHINE BURRS, &c.

SPECIFICATION forming part of Letters Patent No. 244,796, dated July 26, 1881.

Application filed Api-i122, 1881. (No model.)

To all-whom it may concern:

Be it known that I, MIcHAELCUMMINGs, a citizen "of the United States, residing at Colioes, in the county of Albany andwSt'ate ot" New-York, have invented a new and useful Improvement in Means for Supporting and- Adjusting Knitting-Machine Burrs, 85e., of which the following is a specilication.

The nature of luy-invention consists in the combi-nation, ith aknitting-machine burr o r the presser-wheel of such machinesand with the supporting-arm of a spindleV to the top ot' which theburr or presser-wheel is attached, and of a bearing which is below the burr or presser-- wheel, the said spindle and bearing being con-k structed in the peculiar manner hereinafter described, and the former made adjustable eitherI with the bearingor independently of it, and the bearing abrdin g a long balancing-support and lubricating-chambers, and the whole combina-l tion being such that the burrs and pressen wheels of knitting-machines run with very little friction, and the lubricating material is not liable to get upon the work being knitted and thereby soil it.

Figure 1 is an elevation of the burr-wheel and its mountin gs. Fig. 2 is acentral vertical section through the same. Fig.3 is an elevation of the presser-wheel and its' mountings. Fig. 4t is a vertical central section of the same.

Similar letters refer to similar parts throughoutthe several views.

In the drawings,-Ais a supporting-arm of ordinary construction, and fastened as usual by means of a thumb-nut to the frame of a knitting-machine. The free end of the armA is provided with abossJt, and set-screw a2# The boss a' is bored through vertically, and in its bore a chainbered step and lateral bearingblock Bare tted, and fastened by means ot' anadjusting or set screw, a2. This blocli B is formed with a screw-plug bearing, F, at its lower end, which is of just the saine diameter as the larger diameter ot' the interior of the block B, and it is adjustable up and down by meansof a screw-thread formed on it and on the interior of the block, as shown. This plug is of any suitable bearing metal, and can be substituted by a new one when too much worn down. The adjustable plug-bearing F is designed for giving adjustment to the knittinglthe space b, above the bearing b2.

burr or presser-wheel by means of and in the line ofthe axle or shaft thereof, while the setscrew t2 and the movable block B serve for giving any necessary adjustment ot` the parts in the bossa ofthe arm A.

Above the plug-bearin g F a lateral bearing, b2, is formed iu the chambered block B by reducing the diameter of the chamber of the block at the point where this bearing is formed. The bearingbgis constructed below the extreme upper end of the block B, and by this location ot' this bearing annular chambers b and b' are formed for holding lubricating material, the space b being above the bearing-plug Fand Thus each ofthe bearings is provided with its own oilchamber, and a perfect lubrication of both bearings is insured.

It will be observed i'rom the drawings Fig. 3 that the bearing-block B projects down below the boss ct of the arm A as well as extends up above it; also, that in Fig. 2 the bearingblock extends down below the boss a', while its upper end stands slightly below the top of said boss, both constructions shown admitting of-an oil-chamber, b, being formed above the bearing b2, as well as an oil-chamber, b', below said bearing. The constructions shown and described are to obtain a long support for the spindle of the burr or presser-wheel, also,to

provide an oil-chamber of great capacity and at the same time utilize the lower portion of the bearing-block as @balancing-weight for the burr or presser-wheel, and thereby insure amore steady run of the burr during the knit ting operation.

Within the bea'ringblock B the spindle G of a knitting-burr, D, or of a presser-wheel, E, is

the bushing may be dispensed with and a conical bore may be made in the burr itself', and the burr fitted directly to the conical end, c, of the spindle. With this latter mode of fitting lthe cap d', which is shown above bushing d, may be dispensed with, and, in fact, it may be left oft' with either mode of fitting the burr to the spindle, and an ordinary nut substituted for it, such nut screwing upon the end of the bushing, if a bushing is used, in the same manner as the cap screws thereon. In like manner the presser-wheel E is secured to the upper conical end of the spindle, frictional bind alone being the means depended upon for hold-iu g either the burr or the presser-wheel upon the spindle.

The spindle C, below its head c, is formed with an extension, c', below the burr D. This extension is cylindrical iu form, except at its lower end, where it is in form of an inverted cone, as shown at e2. The cylindrical part c' of the spindle tits the bearing b2 of the block B, while the cone end c2 fits in a conical seat, j', formed in the plug-bearing F, as shown. All around the part c of the spindle (see Fie'. 4) a space, as at b and b', is formed within the block B, and into this space, or the chambers 2') b', lubricating material is placed, and the same is entirely below the knitting-burr or presscrtwheel, and no chance for it to get upon the burr or presser-wheel proper is possible.

In order to adapt the bearing-block to some knitting-machines in use it may be necessary to make the bearing-block B with a reduced diameter at the point where it tits the bore of the boss a', as shown in Fig. 2, and also to reduce the diameter of the Oilchamber of said block at the point mentioned, as also shown in said iigure. This mode of adapting the bearing-block to the boss e enables me to retain a large oil-chamber between the bearing b2 and the ilug-bearing F but where the bore in boss a is large enough the block B will be made of uniform diameter from end to end, as shown in Fig. 4 of the drawings.

The invention which I have herein described renders knitting-machines far more perfect in their operation than heretofore, in that the burr or presser-wheel can be balanced, the spindle run with less friction, and the burr or wheel itself adjusted by its own axle independently of the bearing-block, and the burr, spindle, and block all adjusted together as circumstances may require; and my said invention can be readily adapted to that description of knitting-machine wherein the burrs and presser-wheels revolve on fixed studs set in the arms A and fastened by set-screws by removing the studs and burrs from the arms, then taking the burrs oif the studs and fitting them to the spindles C by boring a true and suitable tapering hole through them. This done the improved bearing-blocks B are iitted to the bosses of the arms A, and fastened by the setscrews u?. The old machines thus chan ged can have the burrs or the presser-wheels adjusted to the needles, first, by the bearing-block B being set as near as possible in the proper relation to the needles; and, second, by means ofthe screwplug bearing F.

The advantages gained by my invention of combining the burrs or the presser-wheels ot' knitting-machines with spindle-shafts having two separated bearings, if and F, in a bearingblock, B, formed with an oil-space, b', or chambers b and b', and situated entirely below the burrs. and provided with adjusting-screws c2 and F, are, rst, a great reduction of friction inthe operation of the burr-wheels and presserwheels, which, according to careful observa tion, compares as one twelve-hundredth to one one-huudred-and-twenty-fifth foot-pound in the old and improved construction, this being equal to a reduction of nine hundred percen tum; second, it insures cleanliness, as all the lubricating material is kept in the bearingblock B, and at the same time the facilities for adjusting the burrl or wheel by its shaft. as well as by the bearingblock, are preserved.

Prior to my invention a knitting-burr pro vided with a stud-bearing and stud-shaft, and lubricated from below the burr by means of a side chamber and horizontal ChanneLWay, had been devised; but this construction does not run with little friction, nor is there any means by which the burr can be adjusted by its shaft as well as by its bearing. There also had been devised, prior to my invention, improved bear ing-blocks with oil-chambers and having separated bearings for spindles; but these diti'er somewhat in construction from my bearing block, and there was not combined with the same a knitting-burr or a presser-wheel of a knitting-machine, and the results which I secure from the combination could not therefore be attained.

What I claim as my invention, and desire to secure by Letters Patent, is-

A knitting-burr or presscr-wheel of a knitting-machine, arcvolving spindle, C, which has a conical end, c2, in combination with a bearing-block, B, provided with an oil-chamber, b, and separated bearings b2 F, the latter of which is an adjustable-screw plug, and with a knitting-machine arm, A, provided with a boss, c', having a set-screw, a2, substantially as and for the purpose described.

Signed in the presence of two subscribing witnesses.

MICHAEL GUMMINGS.

Witnesses:

J Aims FORMAN, DAVID KEEFFE.

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